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3e4585c8fd
functions to support it.
176 lines
4.7 KiB
C
176 lines
4.7 KiB
C
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 2006.
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*/
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/* ====================================================================
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* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/x509.h>
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#include <openssl/asn1.h>
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#include <openssl/dh.h>
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#include "asn1_locl.h"
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static void int_dh_free(EVP_PKEY *pkey)
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{
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DH_free(pkey->pkey.dh);
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}
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static int dh_param_decode(EVP_PKEY *pkey,
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const unsigned char **pder, int derlen)
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{
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DH *dh;
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if (!(dh = d2i_DHparams(NULL, pder, derlen)))
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{
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DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB);
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return 0;
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}
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EVP_PKEY_assign_DH(pkey, dh);
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return 1;
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}
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static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
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{
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return i2d_DHparams(pkey->pkey.dh, pder);
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}
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static int do_dhparam_print(BIO *bp, const DH *x, int indent,
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ASN1_PCTX *ctx)
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{
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unsigned char *m=NULL;
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int reason=ERR_R_BUF_LIB,ret=0;
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size_t buf_len=0, i;
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if (x->p)
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buf_len = (size_t)BN_num_bytes(x->p);
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else
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{
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reason = ERR_R_PASSED_NULL_PARAMETER;
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goto err;
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}
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if (x->g)
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if (buf_len < (i = (size_t)BN_num_bytes(x->g)))
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buf_len = i;
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m=(unsigned char *)OPENSSL_malloc(buf_len+10);
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if (m == NULL)
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{
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reason=ERR_R_MALLOC_FAILURE;
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goto err;
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}
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BIO_indent(bp, indent, 128);
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if (BIO_printf(bp,"Diffie-Hellman-Parameters: (%d bit)\n",
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BN_num_bits(x->p)) <= 0)
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goto err;
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indent += 4;
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if (!ASN1_bn_print(bp,"prime:",x->p,m,indent)) goto err;
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if (!ASN1_bn_print(bp,"generator:",x->g,m,indent)) goto err;
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if (x->length != 0)
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{
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BIO_indent(bp, indent, 128);
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if (BIO_printf(bp,"recommended-private-length: %d bits\n",
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(int)x->length) <= 0) goto err;
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}
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ret=1;
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if (0)
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{
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err:
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DHerr(DH_F_DHPARAMS_PRINT,reason);
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}
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if (m != NULL) OPENSSL_free(m);
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return(ret);
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}
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static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
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ASN1_PCTX *ctx)
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{
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return do_dhparam_print(bp, pkey->pkey.dh, indent, ctx);
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}
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int DHparams_print(BIO *bp, const DH *x)
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{
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return do_dhparam_print(bp, x, 4, NULL);
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}
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const EVP_PKEY_ASN1_METHOD dh_asn1_meth =
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{
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EVP_PKEY_DH,
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EVP_PKEY_DH,
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0,
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"dh",
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"OpenSSL PKCS#3 DH method",
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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dh_param_decode,
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dh_param_encode,
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0,0,0,
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dh_param_print,
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int_dh_free,
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0
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};
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